Fluid-pressure-actuated pump



May 1927' R. c. NEWHOUSE FLUID PRESSURE ACTUAT BD PUMP 2 Sheets-Sheet 1 Filed April 25. 1921 Patented May 10, 1927.

azarus UNITED STATES PATENT OFFICE.

RAY C. NEWHOUSE, OF WAUWATOSA, WISCONSIN, ASSIGNOR TO ALLIS-CHALMERS MANUFACTURING COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF DELAWARE.

FLUID-PRESSURE-ACTUATED PUMP.

Application filed April 25, 1921.

This invention relates in general to improven'ients 1n the construction and operation of fluid propcllmg devices, and relates more specifically to an improved fluid pressure actuated liquid pump An object of the invention is to provide a pump for liquid and semi-fluent suliistances, which is simple and compact in construction and etticient in operation Another object to provide eflicient automatically oparable mechanism for controlling the admis sion and exhaust of air or other fluid under pressure to and from a fluid pressure actuated liquid pump.

It has heretofore been proposed to pump liquid by intermittently filling one or more reservoirs and by subsequently admitting air or other fluid under pressure to the interior of the reservoirsin order to expel the liquid therefrom. It has also been attempted to utilize two reservoirs adapted to alternately deliver charges of liquid to a common discharge conduit, for the purpose ot securing a relativelycontinuous flow of liquid through the discharge conduit. These prior devices have. however, failed to produce the desired uninterrupted flow through the discharge conduit, because of the fact that they embodied no means for positively preventing delivery of liquid from one reservoir to the common discharge conduit at a greater rate than that at which the other reservoir is charged.

.The present invention contemplates provision of an air pressure actuated liquid pumping device which will produce constant and uniform flow through the discharge conduit when such conditions are desired, and in which the entire operation of the apparatus is automatic. With the present invention liquid is alternately admitted to a pair of reservoirs which communicate with a common discharge conduit and means are pro vided for positively preventing simultaneous discharge of liquid from both reservoirs. The invention further contemplates the provision of highly etlicient valve mechanism or controlling the admission and discharge of air under pressure to and from the reservoirs,

These and other objects and advantages of the present invention will be ap arent from the following description. A c ear conception of an embodiment of the invention and Serial No. 464,415

of the operation of a device constructed in accordance therewith, may be had by referring to the drawings accompanying and forming a part of this specification in which like reference characters designate the same or similar parts in the several views.

Figure 1 is a part sectional front elevation of an air pressure actuated liquid pump.

Figure is a top view of the air pressure actuated liquid pump.

Figure 3 is an enlarged top View of the air admission and exhaust valve mechanism.

Figure 4 is a part sectional enlarged side view of the air admission and exhaust valve mechanism.

Figure 5 is an enlarged end elevation of the aiadmission and exhaust valve mechanism.

Figure 6 is a diagrammatic sectional. view of the valve mechanism, i

The air pressure actuated liquid pumping device comprises in general a pair of scaled tanks or reservoirs 2, 3, liquid inlet means consisting of a conduit or pipe 8 communicable through check valves with both of the reservoirs 9., 3, liquid discharge means consisting of a conduit pipe 9 communicable through check valves 16 with both oi" the reservoirs 2, 3, air pressure inlet means consisting of a throttling valve 101. a supply pipe 10 communicating with a suitable source of air under pressure and control means consisting of a v: lve mechanism and pipes ll, 12 for controlling admission and exhaust of air under pressure to and from the reservoirs 2, 3 respectively. Each of the reservoirs 2, 3 is provided with an inner vertical pipe 4 5 extending substantially throughout its length, through which the.

liquid is delivered to and from the reservoirs.

\Vithin the respective reservoirs 2, 3 are located verticaly movable floats 6, 7 which are vertically movable along upright rods 22 having spaced upper and lower collars 23, 24 secured thereto. The rods are slidably supported in suitable bearings and have their upper extremities provided with recessed colla rs which are operatively connected with the horizontal arms of hell cranks 19, 2d. The bell cranks 19, are provided with adjustable Weights 21 for urging them in pre determined directions about their pivots. The vertical arm of the bell crank 19 is com till , The vertical arm of the bell crank 20 is connected with the air admission valve 26, for controlling the admission and exhaust of air under pressure to and from the reservoir 3, by means of a connecting rod 18. The connecting rods 17, 18 are slidably mounted in suitable brackets formed integral. with the valve casing 14 and are connected with the respective valves 25, 26 by means of downwardly extending bifurcated plates 33, 34, see Figs. 3, 4 and 5. The plates 33, 3 1 are adjustable along the connecting rods 17, 18 by means of nuts 11 coacting with screw threaded portions of the connecting rods and clamping the plates 33, 3 1 between them.

Each oi the connecting rods 17, 18 is provided with a recessed collar 43 adjustably secured to its end by means of a. nut 42. I Locking levers 2%, 30, which are horizontally pivotally secured to the valve casing 14, are provided with lateral arms forming bell cranks having the longer members, terminating in the forks 14:, adapted to embrace the annular recesses of the collars 43, while, the shorter members 45 are slotted to receive the upwardly extending projections of the oscillating locks 35, 36. The locks 35, 36 are mounted to rock horizontally in the body 14 and are provided with depending lugs which swing in two vertical planes across the longitudinal paths of the valves 25, 26, the said valves being each provided with reduced portion 39 adjacent their opposed ends to admit the lugs aforesaid. The valves 25, 26 have also the reduced portions 10 that provide annular chambers, within their respective bores 18, for connecting the air inlets 31, 32 with the pipes 11, 12 during the respective periods of discharging fluid; also for connecting the exhaust ports 27, 28 with the pipes 11, 12 after the pressures have performed their respective functions. The said inlets 31, 32 are directly connected to the air supply pipe 10 bymeans ot the passage 416. The ends of the pipes 11, 12 within the reservoirs 2, 3 are provided with buoyant checkvz-ilves 13 that close the pipes 11, 12 when the liquid level within the reservoirs rises to where the said valves seat themselves. These buoyant valve members are mounted closely about the downward extensions alined with the pressure pipes 11,12.

The piston valves 25, 26 are limited in their longitudinal movements by the screws 37, 38 which are adjustable respectively in extended brackets 47 and in the body 14, the, said'sc'rews being positioned coaxially with the aforesaid piston valves. The piston valve .25 is actuated by the rod 17,

the said rod, through the arm 29, rocks the oscillating lock 3:) which arrests the valvc 26; and the rod 18, through the arm 30, a-l'lects, in like manner, the opposite oscillating lock 36 which similarly retains valve 26 in its hmgitudinal position. The recesses formed in the ends of the valves 2:). 26 by virtue of the reduced portions 3%) and which are adapted to receive the retaining lugs oi the locks 35, 36, are 01 such length measured longitudinally of the valves, that while they permit limited travel of the valves thcy will not permit movement oi a lockcd valve beyond neutral position. This will be apparent from Fig. (3 wherein the lug an is in effective position with respect to the valve 2., and while permitting movement ol' the valve 25 to the left so as to disconnect the inlet port 31 from the pipe 1.1. the lock positively prevents movement of the valve 25 to a position wherein communicalion is established between the pipc 11 and thc cxhaust port 27. The depending lugs (11' the locking members 35, 36 are of sullicicnt distance apart, longitiulinally, so as to prevent any possible registry of the inlet or outlet ports, other than those intended for registry during the operation of this invention; but, a condition may arise, due to pressure effects, whereby the valves 25, 20 may be displaced and this condition would be taken care of, by the said locking mcmbcns. as is illustrated, diagrannnatically, in Fig. (3.

With the locking member 36 disposed within the path of travel of the valve 25 as shown in Fig. (5, the reservoir 3 is being supplied with liquid lrom the supply conduit 8 and the reservoir 2 has been emptied, thereby causing the iioat (3 to coact with the collar 24 and to shift the rod 17 and the valve 25 to the left as far as permitted by the locking member 36. The valve 25 is thus locked in neutral position until the reservoir 3 has been completely lilled, whcrcupon the locking member 36 will be withdrawn from the path of travel ol the valve and will permit the rod 17 to become ellective to pull this valve to reservoir filling position against the stop 37 at the extreme left. In this manner, only one of the reservoirs will be tilled during a prcdclcrmincd period of time, irrespective ol' the condition ol the operation of the other.

The operation of this invention contemplates two conditions; first, that in which the delivery of material from the pump is to be relatively continuous regardless of the conditions of the supply; and second, that in which the delivery of material to the pump is relatively continuous regardless of the conditions of the discharge. In the lirst case, the operating pressure is controlled by the throttle valve 101 in the pressure supply iine, which prevents material. from being discharged from either tank at a rate Boo llll

lild

"ill

greater than that desired- This insures that either tank will be filled before the other line, will be opened to a position which will insure operatingpressure sufiicient to discharge either tank before the other tank is filled. r

The operation of this invention, as here illustrated, shows a positionwhere the contents of a container or reservoir 2 is about to be discharged through the outlet 5) by pressure admitted through the valve merha' nism. housed in the valve easing or body 14. The float (i in the reservoir 2 rises as the float T in the reservoir 2.) descends and their respective actions affect the valve mechanism, simultaneously, by shiftii'ig the valves 26 thereby providing air pressiu'e tor the filled reservoir 2 and, coincidently, withholding said pressure from the reservoir 3 so that the latter may be replenished with the pumped product. Float 6, as shown in Fig. 1, raises the collar 23 fixed upon the rod 22, thereby rocking the bell crank 19, the latter being assisted by a counter weight- 21, pushing the actuating rod 17 which in turn shifts the piston valve 25. In reservoir 3 thefloat 7 has settled upon the collar 24:

and through the rod 22, in this reservoir, rocks the bell crank 20, pushing the actuating rod 18 which shifts in an opposite direction the piston valve 26. The valve mechanism of bodyhl l is protected from being flooded with the pumped products bythe float valves 13 .which cut oil' access to thc pipes 11., 12 should be silt-carryingproducts being pumped rise abnormally.

Figs. 3 and 4 disclose the valve arrange ments that are affected by the above described rods 17,".18 both rods being actuated by the structures contained in the reservoirs 2, 3. The piston valve actions are parallel to each other in the work performed and the describing of one set will suffice for the other one which is disposed in an o )posite manner, but functioning similarly. The piston valve member reciprocates horizontally in a longitudinal bore 48 in the body 14 and is connected to the rod 17 by the de pending plate 33; the said valve member has a reduced portion 4 that allows the pressure source to supply air, through the pipe 10, the passage 46 and the pipe 11, to force the contents of the reservoir 2 up the vertical pipe 4, depressing the inlet valves 15, rais ing the discharge valves 16, and. exhausting through the conduit 9. The rod 17 extends beyond the arm 33 and provided with the annular recessed collars 43 that are embraced by the forked end 44 of the bell crank 29. The slot-ted arm 45 of thebell crank 29 envelopes the upwardly extending rong of the locking member 35 which is horizontally pivoted over the piston valve member 26,

moving under pressure, by virtue oi the de pending lug oi. the lock 35 having swung into thereduced portion 69 ot the. valve 26, thus preventing displacement of the said valve member. In like manner the locking member 36 has been rocked similarly to dispose one of its lower lugs where the valve 25 will be held in position for the passage of air pressure to the betore mentioned reservoir 2.

By regulating the pressure supply through means of the valve 101, any desired rate of discharge within the capacity of the pump may be obtained.

Thus is performed an alternate filling and discharging of the reservoirs 2, in succe sion, which is at no time simultaneous, while ofliering a virtually continuous flow through the discharge conduit 9.

It should be understood that it is not desired to limit the present invention to the exact details of construction here shown and described, for obvious modifications willoc cur to a person skilled in the art.

It is claimed and desired to secure by Letters Patent 1. In a pump,a pair of reservoirs, means for conducting liquid into and out of said reservoirs, means for conducting elastic fluid. into and out of said reservoirs, independent valves for controlling both. admission and discharge of elastic fluid to and from each of said reservoirs, means operable by movement of oneofsaidvalvcs for locking the other against movement, and means for positively preventing delivery of liquid from said reservoirs to said elastic fluid admission means.

2. In a pump, a pair of reservoirs, means for comlucting liquid into and out of said reservoirs, means for conducting elastic fluid into and out of said reservoirs, independently operable valves for controlling both admission and discharge of elastic fluid. to and from each of said reservoirs, means operable directly by movement of one of said valves for locking the other against u'u'ivement, and a float movable simultaiu-zously with variations in liquid level in each of said. reservoirs for controlling the operation of said locking means.

3. In a pump, a pair of reservoirs, means for conducting liquid into and out of said reservoirs, means for conducting elastic fluid into and out of said reservoirs, independently movable valves for controlling bot-h ad- IDISSlOIl and discharge of elastic fluid to and from each of said reservoirs, and means operable directly by movement of one of said. valves for locking the other against movement.

4. In a pump, a pair of reservoirs, means for admitting liquid to said reservoirs, a float movable simultaneously with variations in liquid level in each reservoir, independentlyoperable valves for controlling admission of elastic fluid to each reservoir, means associated directly with each of said valves for positively locking the other against movement, and a guide positively movable in opposite directions by an adjacent float to actuate said locking means.

5. In a pump, a pair of reservoirs, means for conducting liquid to and from said reservoirs, independently operable valves for controlling both admission and discharge of elastic fluid to and from each reservoir, a float operable by variations in liquid level in each reservoir to positively move the control valve of saidreservoir in opposite directions, and a locking lever cooperable directly with each of said valves to positively prevent simultaneous admission or discharge of elastic fluid to or from both of said reservoirs.

6. In a pump, a pair of reservoirs, means for conducting liquid into and out of the lower ends of said reservoirs, means for conducting air into and out of said reservoirs above the liquid therein, independently movable valves for controlling both admission and discharge of air to and from each of said reservoirs, and a lever operable directly by movement of one of said valves for lockingthe other against movement.

7. In a pump, a pair of reservoirs, means for admitting liquid to said reservoirs, a float movable simultaneously With variations in liquid level in each of said reservoirs. in-

dependently movable valves for controlling admission of elastic fluid to each of said reservoirs, means associated With each of said valves for positively locking the other valve against movement for a definite period of time, and a movable guide for each of said floats for actuating said valves and said locking means.

having parallel bores communicable with I said fluid conducting means. independent valves movablein said bores for controlling both admission and discharge oi elastic lluid to and from each of said reservoirs. and

means operable by movement of each oi? said 7 valves for locking the other-against movement.

9. In a pump, a pair of reservoirs, means for conducting liquid into and out of said reservoirs, means for conducting elastic lluid into and out of said reservoirs, a casing having parallel bores communicating with said fluid conducting means, independent valves movable within said bores tor controlling both admission and discharge of elastic fluid to and from each of said reservoirs, and a locking lever operable by movement of each olsaid valves for locking the other againstmovement, said locking levers being movable transversely of the direction of movement of said valves.

10. In a pump, a pair 0'! reservoirs, means for conducting liquid into and out of said reservoirs, means for conducting;' elastic fluid into and outof said reservoirs. a casing having parallel bores communicable with said fluid conducting means, a piston valve mov able in each of said bores for controlling, the admission and discharge of elastic fluid to and from one of said reservoirs, each of said valves having a portion of reduced diameter, and a locking lever operable by movement of each of said valves and adapted to enter the portion of reduced diameter of the other of said valves for locking said other valve against movement.

In testimony thereof. the signature of the inventor is atlixed hereto.

RAY C. NEIVHOUSE. 

